Glacial Refugium versus Range Limit: Conservation Genetics 1 of Macoma Balthica, a Key Species in the Bay of Biscay (france)

Glacial refugium versus range limit: Conservation genetics of Macoma Balthica, a key species in the Bay of Biscay (France)

University of Groningen Spatial arrangement of genetic variation in the marine bivalve Macoma balthica (L.) Luttikhuizen, Pieternella

Mitochondrial DNA sequence data for 295 individuals were collected from ten sites across the European distribution of the marine bivalve Macoma balthica (L.), and from Alaska. The data were used to estimate levels of genetic exchange and infer population subdivision history. The haplotypes encountered represent a deep gene tree, and the geographic distribution of the lineages shows both allopat...

Glacial refugia and recolonization pathways in the brown seaweed Fucus serratus.

The last glacial maximum (20,000-18,000 years ago) dramatically affected extant distributions of virtually all northern European biota. Locations of refugia and postglacial recolonization pathways were examined in Fucus serratus (Heterokontophyta; Fucaceae) using a highly variable intergenic spacer developed from the complete mitochondrial genome of Fucus vesiculosus. Over 1,500 samples from th...

Survival and settling of larval Macoma balthica in a large-scale mesocosm experiment at different f CO2 levels

Anthropogenic carbon dioxide (CO2) emissions are causing severe changes in the global inorganic carbon balance of the oceans. Associated ocean acidification is expected to pose a major threat to marine ecosystems worldwide, and it is also expected to be amplified in the Baltic Sea where the system is already exposed to relatively large natural seasonal and diel pH fluctuations. We studied the r...

Effects of hypoxia on predator-prey dynamics of the blue crab Callinectes sapidus and the Baltic clam Macoma balthica in Chesapeake Bay

In general, hypoxia (<2 mg O2 l–1) is detrimental to marine food webs because of faunal declines associated with persistent, severely low oxygen. However, transfer of benthic production to higher trophic levels could be facilitated under hypoxia if infauna migrate to shallower burial depths, increasing their availability to predators. A series of outdoor mesocosm and laboratory experiments were...